Overview
Recycled PET material is produced through mechanical or chemical recycling of post-consumer or industrial PET waste, primarily bottles and packaging. The recycling process involves sorting, cleaning, and reprocessing into flakes or pellets suitable for manufacturing. As a circular economy solution, rPET typically retains 80-90% of virgin PET's mechanical properties while reducing carbon footprint by 60-70%. Global production exceeds 8 million metric tons annually, with growing demand from brands committed to sustainability. The material is classified by color (clear, blue, green) and contamination levels, with food-grade rPET requiring stringent purification processes to meet FDA or EFSA standards.
Physical and Chemical Properties
Recycled PET maintains the core characteristics of virgin PET: excellent tensile strength (50-70 MPa), low moisture absorption (<0.5%), and good chemical resistance to alcohols and oils. Key differences include slightly reduced IV values (0.65-0.85 dl/g vs 0.80-1.00 dl/g for virgin) due to polymer chain degradation during recycling. Thermal properties remain stable with a glass transition temperature around 75°C. Processability may require adjusted extrusion temperatures (5-10°C lower than virgin PET) to account for viscosity variations. UV stability can be enhanced with additives during reprocessing for outdoor applications.
Main Applications
Food contact applications dominate rPET usage, including beverage bottles (up to 100% rPET content in some countries) and thermoformed trays. Non-food applications include polyester staple fiber for textiles (carpets, clothing) accounting for 40% of global rPET demand, and industrial uses like strapping bands and engineering plastics. Emerging applications include 3D printing filaments and construction materials. In automotive sectors, rPET composites are used for interior panels and insulation. The material is increasingly specified in LEED-certified building projects for its sustainability credentials.
Safety and Storage
Proper storage requires protection from moisture (max 0.02% water content for processing) and contamination. Bulk bags with UV-resistant lining are recommended, with shelf life of 12 months in controlled conditions. During thermal processing, adequate ventilation is needed to prevent acetaldehyde accumulation. Food-grade rPET must comply with migration limits for heavy metals (EU 10/2011) and non-intentionally added substances (NIAS). Suppliers should provide full traceability documentation including previous use history and decontamination certificates for critical applications.
B2B Procurement Guide
Key specifications to evaluate include: melt flow rate (MVR) for injection molding grades (typically 15-35 g/10min), intrinsic viscosity for fiber applications (0.60-0.72 dl/g), and color index (L* value >80 for clear grades). Request certificates for FDA/EFSA compliance if needed. Audit suppliers for recycling technology (mechanical vs chemical) and sorting capabilities. Leading producers offer batch consistency guarantees with ±5% property variation. For large orders, consider regional pricing variations - Asian rPET commonly trades at 10-15% discount to European grades but may have higher transport costs.
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