Collection and sorting of post-consumer waste
The process begins with the collection of used PET products, primarily beverage bottles. These materials are gathered through recycling systems and transported to processing facilities. Sorting is a critical step, where PET is separated from other plastics, metals, and contaminants.
Advanced sorting technologies such as optical scanners and density separation systems are used to ensure material purity. The quality of this stage directly impacts the final RPET packaging performance, especially in food packaging manufacturing where contamination must be minimized.
Cleaning and decontamination
After sorting, the collected PET is washed and cleaned to remove labels, adhesives, and residual contents. This stage includes hot washing, friction cleaning, and chemical treatment to eliminate impurities.
Decontamination is essential for food-contact applications. Regulatory bodies such as the FDA require that recycled plastics used in food packaging must be processed to remove contaminants and ensure safety. This step ensures that RPET material meets strict hygiene and purity standards.
Pelletizing and material preparation
Once cleaned, the PET is processed into flakes and then melted to form pellets or sheets. This stage stabilizes the material and prepares it for further processing.
Material preparation includes:
- Controlling intrinsic viscosity to maintain strength
- Removing residual moisture to ensure processing stability
- Filtering contaminants to improve clarity
These controls are essential for producing consistent RPET packaging materials suitable for thermoforming.
Sheet extrusion and thermoforming
The prepared RPET material is then extruded into sheets and formed into packaging products using thermoforming technology. This process shapes the material into clamshells, trays, and containers used in fresh produce packaging.
The manufacturing process overview at this stage focuses on:
- Maintaining uniform sheet thickness
- Ensuring structural integrity during forming
- Achieving high transparency for retail display
Sequoia operates automated thermoforming production lines, allowing it to produce RPET packaging with consistent quality and high efficiency.
Quality control checkpoints throughout production
Quality control is integrated at every stage of RPET packaging production. Key quality control checkpoints include:
- Verification of recycled content and material origin
- Inspection of thickness consistency and structural strength
- Clarity and visual quality checks
- Closure performance and stacking strength
- Batch traceability from raw material to finished product
These checkpoints ensure that RPET packaging meets both functional and regulatory requirements.
Manufacturer vs trader in RPET production
The difference between a manufacturer and a trader becomes critical in this process. A manufacturer controls each stage of production, from material sourcing to final packaging, ensuring consistency and traceability.
In OEM packaging and ODM packaging projects, this control allows for customization of size, structure, and performance based on specific application requirements. Traders, by contrast, rely on external suppliers and may not have full control over production quality or compliance.
Sequoia’s integrated manufacturing system enables it to manage the entire RPET production process, supporting both standard and customized packaging solutions.
Material standards and export compliance
RPET packaging must meet strict material standards used for food contact applications. The FDA requires that recycled plastics used in food packaging are processed to ensure safety and purity. In Europe, regulations require compliance with migration limits and approved recycling processes.
For global supply chains, export market compliance includes:
- Food-contact safety documentation
- Recycled content verification
- Traceability records
- Labeling requirements
These standards ensure that RPET packaging can be used safely across different markets.
Bulk supply considerations
Scaling RPET production requires careful management of bulk supply considerations. This includes securing consistent raw material sources, maintaining production capacity, and ensuring stable quality across large volumes.
Suppliers must:
- Establish long-term material sourcing strategies
- Maintain consistent production output
- Ensure uniform product performance across batches
Sequoia supports bulk supply through structured production systems and stable capacity planning, ensuring reliable delivery for large-scale packaging programs.
Project sourcing checklist
Project sourcing checklist
Material: RPET grade, recycled content percentage, food-contact approval
Production: manufacturing capability, tooling readiness, process control
Quality: inspection standards, batch consistency, traceability system
Compliance: regulatory documentation, export requirements, labeling standards
Supply: raw material stability, production capacity, delivery reliability
Logistics: packaging efficiency, pallet stability, shipment readiness
Conclusion
RPET packaging is made through a multi-stage process that transforms recycled plastic waste into high-quality packaging materials. Each step, from collection to thermoforming, must be carefully controlled to ensure safety, performance, and compliance.
Manufacturers with integrated production systems, strong quality control, and regulatory expertise are better equipped to deliver consistent RPET packaging. By combining advanced processing techniques with structured management systems, RPET packaging can meet the demands of modern food packaging while supporting sustainable material use.
