A Declaration of Conformity Covering Only the Base Polymer
Base polymer declarations certify monomer purity at the reactor gate but omit all converter additives, breakdown products, and finished article migration limits.
Chain of Custody Traceability
Meaning
Administrative frameworks for material tracking guarantee that the physical movement of a polymer batch aligns with its declared origin and certification. Within recycled plastic supply chains, chain of custody traceability establishes a documented trail from initial waste collection to the final molded part. It prevents the mixing of uncertified polymers with certified recycled stocks by enforcing strict segregation during processing.
Moulders require these records to validate their use of post-consumer resins to regulatory bodies. The scope of this tracking excludes finished product distribution after delivery to the primary packager.
Documentation System
Information flow relies on standardized transfer documents that accompany every shipment of resin. Each processor in the chain records the mass of incoming material and the mass of the outgoing molded parts. This mass balance accounting ensures that the volume of certified recycled products sold does not exceed the volume of recycled feedstock purchased.
It prevents false claims of recycled content in finished goods.
Verification Method
Independent audits confirm that processing plants maintain separate storage silos and distinct production lines for certified batches. Physical testing of the polymer structure cannot distinguish between identical virgin and recycled molecules, making continuous documentation the only path to validation. Auditors verify purchase invoices and production logs to confirm compliance.
The audit trail stops once the polymer is permanently converted into a multi-material assembly.
Supply Security
Brand owners rely on certified supplies to meet recycled content mandates and avoid legal penalties. Inconsistent tracking leads to reputational damage and potential regulatory action. By maintaining strict oversight, processors secure long-term contracts with premium buyers who require fully audited supply chains.